BQ24171: BQ24171 Input: 5V/15V Output: Single Energy Saving Core 4.2V Charging. Can you help review the schematic diagram

liu billy

Part Number: BQ24171

Tool/software:

Dear

BQ24171 Input: 5V/15V Output: Single Energy Saving Core 4.2V Charging. Can you help review the schematic diagram? Can the dotted box be left unused . tks!

3 months ago

0 Jeff F 3 months ago

TI__Guru**** 166076 points

Hi Billy,

Other than the STAT pin connection needing a series resistor, I don't see any obvious issues. Regarding Q2 and the reverse polarity circuit, those are optional (assuming Q2 is shorted).

Regards,
Jeff

0 liu billy 3 months ago in reply to Jeff F

Intellectual 560 points

Confirm whether it is necessary for Q2 and Q4 based on the actual layout situation.

Is Q3 necessary? If not, will the battery consume electricity in reverse.

0 Jeff F 3 months ago in reply to liu billy

TI__Guru**** 166076 points

Hi Billy,

Q3 (or a diode) is required to reverse blocking.

Regards,

Jeff

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BQ24171: BQ24171 Input: 5V/15V Output: Single Energy Saving Core 4.2V Charging. Can you help review the schematic diagram